Neuroscientists have found patterns in brain activity that correlate with single digit numbers. They can literally watch your mind count.
Research into the physiology of how our noggins work has advanced mightily in recent years, especially when it comes to witnessing perception and memory. Technologies like fMRI -- an imaging tool that notes differences in water pressure, sort of -- have been heralded as objective ways to measure what happens in brains when things that were once believed to be solely subjective occurred in minds.
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